Loans - Additional Information (Details)	3 Months Ended
	Mar. 31, 2021 USD ($) loan	Mar. 31, 2020 USD ($) loan	Dec. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for credit loss expense	$ 2,122,000	$ 3,079,000
Financing receivable, allowance for credit losses, net charge offs	1,058,000	910,000
Amortized cost in troubled debt restructurings	17,105,000	$ 15,088,000
Financing receivable, troubled debt restructuring, allowance for loans	$ 1,385,000		$ 779,000
Minimum period to be considered for loan to have defaulted	90 days
Loans modified as troubled debt restructuring with subsequent defaults | loan	0	0
Principal balances forgiven in connection with loan restructuring	$ 0	$ 0
Trouble Debt Restructuring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses, period increase (decrease)	0	$ 0
Commercial and Industrial Sector
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for credit loss expense	$ 2,349,000
Specific reserves related to commercial loan relationships | loan	3
Financing receivable, allowance for credit losses, net charge offs	$ 907,000
Impact by commercial loan relationship | loan	1